.box {
  font-size: 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 500px;
  height: 500px;
  background-color: black;
}
.box .inner {
  display: flex;
  align-items: center;
  justify-content: space-around;
  width: 100px;
  height: 100px;
  background-color: red;
  border: 1px solid black;
  color: black;
}
.box .inner {
  background-color: green;
}
